Alarms that survive a reboot
Design a wake-up alarm app for iOS that "keeps ringing even after the user turns the phone off and on." The app doesn't auto-launch after a reboot and background execution is limited, so give me the most resilient design within those constraints.
iOS system designShort answerExpert
Design an "enhanced playback" feature for an audiobook app. For supported titles, the app…
#background
iOS system designShort answerAdvanced
You're designing an iPhone alarm app. When you have to guarantee the user is alerted at a…
#alarm
PersistenceShort answerAdvanced
You have logs where the app, woken by a background push while the screen is locked, fails…
#background
App lifecycle and systemShort answerIntro
A user is working in your app, takes a phone call, hangs up, goes out to the home screen,…
#background